AHA! thanks for reiterating it for me. I didn't realize they were called wheel sets. I just though they were called rims. Um, yeah. that's what I am looking for. Do I have to take my wheel off the bike and take the tire off it as well to tell how big my wheel is? Im pretty sure I can only get a certain size wheel for my bike right? I just measured it and it looks as though I have an inch exactly of space between my tire and frame/forks on both sides. I don't know if I can get bigger wheels on it or not.